Iowa DOT studying Integrated Corridor Management in Des Moines

Aug. 20, 2021

Ramp metering and other strategies have been programmed in the latest Iowa Transportation Improvement Program

The Iowa Department of Transportation (Iowa DOT) is studying improvements to allow traffic to flow more safely and efficiently through the Des Moines metropolitan area.

The concept—called Integrated Corridor Management (ICM)—brings together key partners to look at how the entire transportation system works together to more cost-effectively and proactively manage traffic without necessarily adding to the size of the system, according to a press release from Iowa DOT.

The department says increased attention has been drawn to one of these strategies—ramp metering—which consists of a signal placed at on-ramps to help traffic more safely and efficiently merge onto I-235.

Prior to the COVID-19 pandemic, this strategy was planned for deployment in 2024. However, significant changes have occurred in commuting patterns on I-235 due to the pandemic, Iowa DOT says.

Several ICM strategies, including ramp metering, have been programmed in the 2022-2026 Iowa Transportation Improvement Program. However, the Iowa DOT recognizes that additional public outreach and analysis are required to gain a better understanding of post-pandemic commuting habits, patterns, and traffic volumes before a final decision is made to implement ramp metering, the department says.